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The design of single-molecule photoswitchable emitters was the firstmilestone toward the advent of single-molecule localization microscopy thatsets a new paradigm in the field of optical imaging. Several photoswitchableemitters have been developed but they all fluoresce in the visible or far-redranges, missing the desirable near-infrared window where biological tissues aremost transparent. Moreover, photocontrol of individual emitters in thenear-infrared would be highly desirable for elementary optical molecularswitches or information storage elements since most communication data transferprotocols are established in this spectral range. Here we introduce a noveltype of hybrid nanomaterials consisting of single-wall carbon nanotubescovalently functionalized with photo-switching molecules that are used tocontrol the intrinsic luminescence of the single nanotubes in the near-infrared(beyond 1 $\mu$m). We provide proof-of-concept of localization microscopy basedon these bright photoswitchable near-infrared emitters.

Photoswitchable Single-Walled Carbon Nanotubes for Super-Resolution Microscopy in the Near-Infrared